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How to use select layer by location in Python?
If a selection_type option is used, the inversion occurs before the selection is combined with existing selections. The following Python window script demonstrates how to use the SelectLayerByLocation function in immediate mode.
How are polygons selected in the selecting layer?
If polygons are used for the input or selecting layer, the polygon’s boundary (line) will be used. Lines that cross at a point will be selected, not lines that share a line segment. HAVE_THEIR_CENTER_IN —The features in the input layer will be selected if their center falls within a selecting feature.
How is the boundary polygon defined in ArcGIS?
Clementini defines the boundary polygon as the line separating inside and outside, the boundary of a line is defined as its end points, and the boundary of a point is always empty. WITHIN —The features in the input layer will be selected if they are within a selecting feature.
When does a boundary touch a selecting feature?
BOUNDARY_TOUCHES —The features in the input layer will be selected if they have a boundary that touches a selecting feature. When the inputs features are lines or polygons, the boundary of the input feature can only touch the boundary of the selecting feature, and no part of the input feature can cross the boundary of the selecting feature.
What to do with the select layer by location tool?
The Get Count tool can be used to find the number of features selected by the Select Layer By Location tool. This can be useful for determining if any features matched the desired spatial relationship before proceeding to further analysis as part of an automated workflow (that is, script or model).
How to calculate field values in arcpy.da?
The code I have for this is currently updating all records for the Line_Count field with the count of the point features (i.e. 2) for only the (second?) record. Though, a print statement following the GetCount line will return the line count for all of the point features (with a few unessential iterations).